Hi @RudySeidinger ,
Happy to help! The List Participants documentation you shared is for past webinars. I just want to confirm whether you are looking for the userId for past or scheduled webinars?
For scheduled webinars, these are the endpoints that might interest you:
https://marketplace.zoom.us/docs/api-reference/zoom-api/webinars/webinarregistrants
https://marketplace.zoom.us/docs/api-reference/zoom-api/webinars/webinarregistrantget
Here’s also some clarity on participantId vs. userId:
Thank you,
Gianni